Claims
- 1. A pin having a central longitudinal pin axis and being adapted for connecting machine elements with each other, which pin comprises a metal shell and a core therein, said core consisting essentially of fully hardened, oil-fast matrix system of a polyimide resin system having a glass transition temperature above 200.degree. C. and at least about 55 percent by volume of the total core volume of a reinforcing granular fillter material embedded in said system.
- 2. The pin of claim 1, wherein said particulate filler is selected from quartz sand and amorphous quartz.
- 3. The pin of claim 1, wherein the thickness of the shell is in the range of from about 1 to 10% of the pin diameter.
- 4. The pin of claim 1, wherein the thickness of the shell is in the range of from 3 to 6% of the pin diameter.
- 5. The pin of claim 1, wherein the polyimide resin system is the fully cured resin obtained from a monomer mixture essentially consisting of 40 to 70 parts by weight of p, p'-bis(imidyl)-diphenylmethane, and, the balance, to make up 100 parts by weight, of a reactive thinner monomer selected from the group consisting of polyfunctional allyl cyanate and aryl cyanate.
- 6. The pin of claim 5, wherein the monomer mixture contains additionally a minor amount of a third monomer component selected from an acrylate of a polyhydric aliphatic alcohol having from 2 to 4 hydroxyl groups, a methacrylate of a polyhydric aliphatic alcohol having from 2 to 4 hydroxyl groups, and an aromatic diamine.
- 7. The pin of claim 6, wherein the aromatic diamine is selected from the group consisting of diamino diphenyl methane and diamino-diphenyl sulfone.
- 8. The pin of claim 5, wherein said aryl cyanate is bisphenol A cyanate.
- 9. The pin of claim 5, wherein said polyfunctional allyl cyanate is 3,3'-diallyl-bisphenol A.
- 10. The pin of claim 5, wherein the uncured monomer mixture affording the polymide resin system further comprises as initiator an organic compound containing an unstable C-C bond and being decomposable by heating into radicals.
Priority Claims (2)
Number |
Date |
Country |
Kind |
3656/80 |
May 1980 |
CHX |
|
9519/80 |
Dec 1980 |
CHX |
|
Parent Case Info
This is a divisional of application Ser. No. 479,343 filed on Mar. 28, 1983, now U.S. Pat. No. 4,456,653, which in turn is a continuation of application Ser. No. 259,393, filed June 1, 1981, now abandoned.
US Referenced Citations (4)
Non-Patent Literature Citations (1)
Entry |
903, Machine Design, vol. 52, No. 10, May 8, 1980, Cleveland, Ohio, USA. |
Divisions (1)
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Number |
Date |
Country |
Parent |
479343 |
Mar 1983 |
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Continuations (1)
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Number |
Date |
Country |
Parent |
259393 |
Jun 1981 |
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